Cohstaht-temperature bath



E. H. RUEDIGER. CONSTANT TEMPERATURE BATH.

l APPLICATION HLED'MAR. 4, ISIS. v 33, 15 Patented Nov. 25,1919.

I Ill l 0 y T I -I I Il. I II I I n I I I I I 1s T 2 T||I I I I I I n lh! .EE-...in I 4 WITNESS- ERNEST H. RUEDIGER, or BIsMARcK, NORTHDAKOTA.

coNsTANTATEi/IPERATURE BATH.,

To all whom t may concern:

Be itV known that I, ERNEST H. RU'EDIGER, a citizen of the UnitedStates,residing at Bismarck, in the county of Burleigh and State of NorthDakota, have invented certain new and useful Improvements in Con letant-Temperature Baths, vof which the following is a specilication.

This invention relates to liquid .baths and has for `its principalobject the production of a device which will maintain a uniformtemperature of liquid within the' bath.

- from a receptacle into the bath for maintaining a predeterminedVtemperature for the liquid within the bath.

One vpractical form of construction Vand assembly of the presentinvention will be hereinafter described and is illustrated in thedrawing, in which:

The figure isa longitudinal sectional view through the device, portionsof the construe; tion' being v`shown in elevation.

1n the preferred embodiment of the present invention about to bedescribed, 5 designates a box, which may be of any desired size orshape, in which the mechanism is carried whereby the entire device maybe easily lifted and carried to a desired placeV and will be protectedfrom injury and will only require a minimum amount of space. Althoughthe boX may be made of any desired material, if made of wood it ispreferably provided with the lining 6 of metal for preventing leakage,it is obvious that if the box is made of wood or like material and thena sheet metal lining is provided the box will be made much lighter thanif made of metal entirely.

A tub 7 is placed within the box and may be of any desired shape,although of course it should preferably conform to the contour 0f theinterior of the box. The receptacle Specicatioii'of Letters Patent.Patented NOV. 25, 1919.' Applicationled March 4, 1919. Serial No.280,645. A

8 is likewise; carried within the boXvand at a slight distance from thetub 7 and spaced from the walls of the boX, as shown at 9 thuslproviding suflicient space for liquid overflowing lthe receptacle topass from the boX through the waste pipe 10.

A pumpcasing 11 for a conventional form of centrifugalV pump is carriedwithin thereceptacle 8V adjacent the upper portion thereof and has adelivery pipe 12 leading downwardly therefrom toward the bottom of thelreceptacle. The conduit 13 is connected. to the delivery pipe 12, thisconduit 13 extending from the receptacle 8 and spanning the spacebetween the receptacle 8 and the tub 7 and passing into the tub asshown. A return conduit ltcommunicates with the lower portion of the tub7 and also with the lower portion of the receptacle 8.

In order to illustrate a complete` structure, a suitable form of circuitclosure 15 is ca rriedjwithin the tub 7 Vand has conductors 16vconnected thereto, the conductors also being connected to the motor 17.The shaft 18 is connected tothe motor and likewise to a suitable pumpwithin the casing 11 not being deemed knecessary to be hereinillustrated as any form of .pump` may be employed'. V

When the device is in use, the receptacle 8y may Abe filled with anysuitable liquid, such as water and obviously the water Will also passfrom the receptacle through the conduit- 14 into the tub 8, thus causingthe liquid level within the tub and the receptacle to be the same. Thereceptacle is filled until it runs over the same and this waste liquidpasses from the boX through the waste pipe` 1.0.l As itv is the objectof this invention to have a cold liquid bath, ice may be placed in thereceptacle 8't`o chill the liquid therein.

As above pointed out, since it is the object of the invention to providea constant temperature cold liquid bath, the thermostatic circuit closeris set to close the circuit when the temperature of the liquid withinthe receptacle rises above a predetermined degree. 'lhus a circuit willbe closed over the conductor 16 and the motor will operate to drive theshaft 18 .and actuate the pump within the casing 11. As the pump isdriven it Vwill force liquid from the receptacle through the deliverypipe 12 and thence through the delivery conduit 13 into the tub 8 itbeing noted that the liquid thus forced from the receptacle is from apoint 2. Ina device of the class described, vthe 50 adjacent the icetherein, thus. causing the` liquid to be very cold. As the chilledliquidv is thus Aforced into the tub, the .-tempera- I ture of theliquid within thetub 7 will be lowered until it Vreaches a predeterminedlow degree andat this time the circuit closer will be acted upon tobreak thecircuit over the conductor 16 thus causing the motor 17 tostop. This action will cause the pump to cease operating, whereuponfurther .foro-- ing of the liquid into the tub will stop. As the chilledliquid above referred to passes into thetub, vsome'of the Aliquidoriginally carried within the tub will pass through 'the conduit 1-1back into the receptacle 8 wherein it again will be chilled. K

Thus it will be seen that the liquid within the tub 7 will be maintainedat a desired` temperature and accordingly articles or material to becooled will be-placed within the tub. It is therefore apparent that thedevice is particularly advantageous in medical diagnosis, especially forcertain forms of reaction and tests. v l

The Vforegoing description and accomy panying drawings have reference towhat might be considered to be the approved or preferred form of myinvention. I Vdesire it to be understood that I` maymake such changes inthe construction, combinationand arrangement of parts, materials,dimensions, et cetera, as may prove expedient and fall within the scopeof the appended claims.

Having thus fully described my invention what I claim as new and desireto secure by Letters Patent is l 1. In a device of the class described,the combination of a tub, a receptacle carried adjacent said tub, adelivery 'conduitl connecting said receptaclev to said tub, a returnconduit communicating with the receptacle, and the tub, and means forforcingV liquid fromV said receptacle through said delivery conduit intosaid tub, while some liquid from said tub will flow therefrom throughthe return conduit into said receptacle, thus retaining the liquidwithin the tub at a desired temperature.

combination of a tub, a receptacle carried adjacent'sai'd tub, a" pumpcasing carried adjacent .the-upper portions of the receptacle and havinga delivery pipe depending therefrom, a horizontally extending deliverycarried within said receptacle, the circuitV embodying the circuitcloser. andY motor, a'

motor shaft extending from said motor, pump means carried within sa-idpump casing and being connected to said shaft, whereby whenthe circuitis closed the motor will operate for drivingthe shaft and operating thepump thus causing liquid in said receptacle to lbe 'forced through thesaid delivery pipe and supply conduit into said tub, while liquid fromthe tub will pass through said return conduit into the receptacle thuskeeping the liquid within the tub at a desired temperature. p f

3. In a device ofthe class described, the combination of a box, awastepipe leading from said box, an enlarged tub carried within saidbox,a reduced receptacle lcarried within said box, a delivery conduitconnecting said receptacle toV said tub, a return conduit Vcommunicatingwith said tub and receptacle, andV means for forcing Vliquid f f ERNESTH'RUEDiGER. Witnesses: l V l I A; M. BRANDT, Y N. O. RAMsrAD. l

